1.当我18岁的时候我就要上大学了（是未完成的）

题目

1.当我18岁的时候我就要上大学了（是未完成的）
2.在我七岁的时候我就要上学了（已完成）
3.如果我有钱,我就给我妈妈买一个大房子
4.如果我吃得多,我觉会很胖
5.在我读完英语以后我就看电视了

答案

1.I will go to university when I am 18.
I will enter university when I am 18.
2.I started school at the age of seven.
I started school when I was seven years old.
3.If I have money,I will buy a big house for my mother.
4.I will become fat if I eat too much.
If I eat to much,I will become fat.
5.I watch TV after reading English
After I finish reading English,I watch TV.